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22q11.2 microduplication in two patients with bladder exstrophy and hearing impairment

Lundin, Johanna; Soderhall, Cilla; Lunden, Lina; Hammarsjo, Anna; White, Irene; Schoumans, Jacqueline; Lackgren, Goran; Clementson Kockum, Christina LU and Nordenskjold, Agneta (2010) In European Journal of Medical Genetics 53(2). p.61-65
Abstract
Bladder exstrophy is a congenital malformation of the bladder and urethra. The genetic basis of this malformation is unknown however it is well known that chromosomal aberrations can lead to defects in organ development. A few bladder exstrophy patients have been described to carry chromosomal aberrations. Chromosomal rearrangements of 22q11.2 are implicated in several genomic disorders i.e. DiGeorge/velocardiofacial- and cat-eye syndrome. Deletions within this chromosomal region are relatively common while duplications of 22q11.2 are much less frequently observed. An increasing number of reports of microduplications of this region describe a highly variable phenotype. We have performed array-CGH analysis of 36 Swedish bladder exstrophy... (More)
Bladder exstrophy is a congenital malformation of the bladder and urethra. The genetic basis of this malformation is unknown however it is well known that chromosomal aberrations can lead to defects in organ development. A few bladder exstrophy patients have been described to carry chromosomal aberrations. Chromosomal rearrangements of 22q11.2 are implicated in several genomic disorders i.e. DiGeorge/velocardiofacial- and cat-eye syndrome. Deletions within this chromosomal region are relatively common while duplications of 22q11.2 are much less frequently observed. An increasing number of reports of microduplications of this region describe a highly variable phenotype. We have performed array-CGH analysis of 36 Swedish bladder exstrophy patients. The analysis revealed a similar and approximately 3 Mb duplication, consistent with the recently described 22q11.2 microduplication syndrome, in two unrelated cases with bladder exstrophy and hearing impairment. This finding was confirmed by multiplex ligation-dependent probe amplification (MLPA) and FISH analysis. Subsequent MLPA analysis of this chromosomal region in 33 bladder exstrophy patients did not reveal any deletion/duplication within this region. MLPA analysis of 171 anonymous control individuals revealed one individual carrying this microduplication. This is the first report of 22q11.2 microduplication associated with bladder exstrophy and hearing impairment. Furthermore the finding of one carrier among a cohort of normal controls further highlights the variable phenotype linked to this microduplication syndrome. (C) 2010 Elsevier Masson SAS. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
22q11.2 microduplication, Bladder exstrophy, Hearing impairment, syndrome, Array-CGH
in
European Journal of Medical Genetics
volume
53
issue
2
pages
61 - 65
publisher
Elsevier
external identifiers
  • wos:000281579300002
  • scopus:77950627751
ISSN
1769-7212
DOI
10.1016/j.ejmg.2009.11.004
language
English
LU publication?
yes
id
22b1d0d9-6bdf-4d2d-b275-4dc346be3d9c (old id 1697763)
date added to LUP
2010-10-22 16:17:29
date last changed
2018-05-29 10:37:22
@article{22b1d0d9-6bdf-4d2d-b275-4dc346be3d9c,
  abstract     = {Bladder exstrophy is a congenital malformation of the bladder and urethra. The genetic basis of this malformation is unknown however it is well known that chromosomal aberrations can lead to defects in organ development. A few bladder exstrophy patients have been described to carry chromosomal aberrations. Chromosomal rearrangements of 22q11.2 are implicated in several genomic disorders i.e. DiGeorge/velocardiofacial- and cat-eye syndrome. Deletions within this chromosomal region are relatively common while duplications of 22q11.2 are much less frequently observed. An increasing number of reports of microduplications of this region describe a highly variable phenotype. We have performed array-CGH analysis of 36 Swedish bladder exstrophy patients. The analysis revealed a similar and approximately 3 Mb duplication, consistent with the recently described 22q11.2 microduplication syndrome, in two unrelated cases with bladder exstrophy and hearing impairment. This finding was confirmed by multiplex ligation-dependent probe amplification (MLPA) and FISH analysis. Subsequent MLPA analysis of this chromosomal region in 33 bladder exstrophy patients did not reveal any deletion/duplication within this region. MLPA analysis of 171 anonymous control individuals revealed one individual carrying this microduplication. This is the first report of 22q11.2 microduplication associated with bladder exstrophy and hearing impairment. Furthermore the finding of one carrier among a cohort of normal controls further highlights the variable phenotype linked to this microduplication syndrome. (C) 2010 Elsevier Masson SAS. All rights reserved.},
  author       = {Lundin, Johanna and Soderhall, Cilla and Lunden, Lina and Hammarsjo, Anna and White, Irene and Schoumans, Jacqueline and Lackgren, Goran and Clementson Kockum, Christina and Nordenskjold, Agneta},
  issn         = {1769-7212},
  keyword      = {22q11.2 microduplication,Bladder exstrophy,Hearing impairment,syndrome,Array-CGH},
  language     = {eng},
  number       = {2},
  pages        = {61--65},
  publisher    = {Elsevier},
  series       = {European Journal of Medical Genetics},
  title        = {22q11.2 microduplication in two patients with bladder exstrophy and hearing impairment},
  url          = {http://dx.doi.org/10.1016/j.ejmg.2009.11.004},
  volume       = {53},
  year         = {2010},
}